That means that you never open your door unless you know who it is. Since you will never know all the UPS, FedEx, or mail carriers, you must never open to any of them.
Sound too extreme?
Not to the ex-girlfriend of Prodromos Vasilopoulos, 23, of Athens, Greece. According to an article in myfoxphilly, Vasilopoulos pretended to be a UPS delivery man to get into her apartment. He then brutally attacked and raped her several times.
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